IF I lost my ability to write, I don’t know what I’d do – other than make you readers deliriously happy.In “The Legend of Bagger Vance,” which opens tomorrow, Matt Damon plays an ex-golf champ who, after returning from action in World War I, can’t get his swing back.

With the help of his caddie, Bagger Vance (Will Smith), he overcomes that and life’s other obstacles.

But what if one were to lose their metaphorical swing? How would he or she get it back?

At the premiere party for “Bagger Vance” I shot around the event, asking some of the celebs what they would do.

Surprisingly, each had a different approach for dealing with this adversity.

Robert Redford, who directed the flick – which goes well beyond the game of golf – says when his “swing” is off, the fault lies not with his stars, but with himself.

Redford said to overcome a temporary handicap, “I would look inside myself.”

Once I looked inside myself, and all I found was some bad tuna.

And whereas Redford becomes introspective, Damon admits he gets out of the rough with the help of others.

Damon told me that to get back on course, “The first thing I would do is return to my family and friends, because losing contact with these people is how I lose my swing.”

The actor went on to say, “The minute I go back to my family, the problem is solved.”

That’s great – unless your family is the problem.

Charlize Theron, Damon’s love interest in the film, feels you need to confront whatever is keeping you from playing on par.

The beautiful – though too tall for me – actress believes, “What you have to do is go on the journey and face whatever you find, and it will make you stronger.”

Theron added, “‘Bagger’ is what you surround yourself with.”

As a beginning golfer, I just surround myself with a bunch of putts.

It would’ve been nice to share what Will Smith thought, but the “Bagger Vance” star bagged the party – and I’m still, for lack of a better golf pun, teed off.

Sigourney Weaver isn’t in the film, but the “Alien” star – who’s also too tall for me – had her own thoughts on how to get one’s “swing” back.

She said, “If you think too much about it, it will only make it more difficult, so I would just wait – for as long as it takes – until it returned.”

And while I truly respect her sit-on-your-butt-and-do-absolutely-nothing approach, after some reflection, it dawned on me that not everything has to come back – in particular bell bottoms, disco and Burt Reynolds.

The next night I was invited by Mary Higgins Clark and her daughter Carol to the New York Athletic Club, where the two mystery writers were celebrating their first collaborative effort, “Deck the Halls.”

Still obsessed with losing one’s “swing,” I asked the senior Clark – who is the right height for me – what she would do if her talent for cranking out suspense novels lapsed.

“It would be a great tragedy, because it’s who I am as a human being,” said Clark.

Incredibly, the best-selling author has never suffered from writer’s block, and the reason she’s never missed a (key)stroke, she confided, “is because of two words – royalty checks.”